(12+9i)+(-5+5i)=

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Solution for (12+9i)+(-5+5i)= equation:


Simplifying
(12 + 9i) + (-5 + 5i) = 0

Remove parenthesis around (12 + 9i)
12 + 9i + (-5 + 5i) = 0

Remove parenthesis around (-5 + 5i)
12 + 9i + -5 + 5i = 0

Reorder the terms:
12 + -5 + 9i + 5i = 0

Combine like terms: 12 + -5 = 7
7 + 9i + 5i = 0

Combine like terms: 9i + 5i = 14i
7 + 14i = 0

Solving
7 + 14i = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 14i = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 14i = 0 + -7
14i = 0 + -7

Combine like terms: 0 + -7 = -7
14i = -7

Divide each side by '14'.
i = -0.5

Simplifying
i = -0.5

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